Johan Jansen
type: MusicGroup
genre: indorock
description: Johan Jansen (born 7 February 1989) is a Dutch professional footballer who plays, as a goalkeeper, for Sparta Nijkerk in the Dutch Derde Divisie. Career Born in Terschuur, Jansen made his professiona
popularity: 4
followers: 239
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x85dd8cc172b8546b5555a661c603b7587708579af6a5eb905a2a4fece0266fba
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953864
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953864
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/04396206-9d05-495f-aefd-f1c9a44e7d1a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/04396206-9d05-495f-aefd-f1c9a44e7d1a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/04396206-9d05-495f-aefd-f1c9a44e7d1a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T00:30:31Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x85dd8cc172b8546b5555a661c603b7587708579af6a5eb905a2a4fece0266fba","name":"Johan Jansen","registered_at":"2026-06-15T14:55:07Z","symbol":"NIM0743359","token_address":"0x2b3b56ebd5d416a57803e5a006a94fc12aa4fa65","type":"artist","uuid":"04396206-9d05-495f-aefd-f1c9a44e7d1a"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85dd8cc172b8546b5555a661c603b7587708579af6a5eb905a2a4fece0266fba. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04396206-9d05-495f-aefd-f1c9a44e7d1a.json and https://artists.proofprofile.net/proofs/artist/04396206-9d05-495f-aefd-f1c9a44e7d1a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T07:53:13Z
  text: {"copyright_id":"0x85dd8cc172b8546b5555a661c603b7587708579af6a5eb905a2a4fece0266fba","name":"Johan Jansen","registered_at":"2026-06-15T14:55:07Z","symbol":"NIM0743359","token_address":"0x2b3b56ebd5d416a57803e5a006a94fc12aa4fa65","type":"artist","uuid":"04396206-9d05-495f-aefd-f1c9a44e7d1a"}
album: Johan Jansen Plays Country Love Songs on Steelguitar
  type: MusicAlbum
  date published: 2003
album: Steel JJ's Christmas Collection
  type: MusicAlbum
  date published: 2020-11-07